package com.mls.fivedistrict.util;

import java.util.HashMap;
import java.util.Map;
import java.util.regex.Pattern;

/**
 * 身份证校验工具
 * Created by chenxiuxiang on 2018/4/1.
 */
public class IdcardNoValidateUtil {
    private final static Map<String, String> cityMap;
    //粗略的校验
    private static final Pattern pattern = Pattern.compile("^(\\d{6})(19|20)(\\d{2})(1[0-2]|0[1-9])(0[1-9]|[1-2][0-9]|3[0-1])(\\d{3})(\\d|X|x)?$");

    /**
     * 18位身份证校验,粗略的校验
     *
     * @param idCard
     * @return
     * @author lyl
     */
    public static boolean is18ByteIdCard(CharSequence idCard) {
        return pattern.matcher(idCard).matches();
    }

    public static void main(String[] args) {
        boolean byteIdCard = is18ByteIdCard("410222199811099849");
        System.out.println("byteIdCard：" + byteIdCard);
    }

    /**
     * 18位身份证校验,比较严格校验
     *
     * @param idCard
     * @return
     * @author lyl
     */
    public static boolean is18ByteIdCardComplex(CharSequence idCard) {
        int[] prefix = new int[]{7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2};
        char[] suffix = new char[]{'1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2'};
        if (is18ByteIdCard(idCard)) {
            if (cityMap.get(idCard.subSequence(0, 2).toString()) == null) {
                return false;
            }
            int idCardWiSum = 0;  //用来保存前17位各自乖以加权因子后的总和
            for (int i = 0; i < 17; i++) {
                idCardWiSum += (idCard.charAt(i) - '0') * prefix[i];
            }

            int idCardMod = idCardWiSum % 11;//计算出校验码所在数组的位置
            char idCardLast = idCard.charAt(17);//得到最后一位身份证号码

            return idCardLast == suffix[idCardMod];
        }
        return false;
    }

    static {
        cityMap = new HashMap<>();
        cityMap.put("11", "北京");
        cityMap.put("12", "天津");
        cityMap.put("13", "河北");
        cityMap.put("14", "山西");
        cityMap.put("15", "内蒙古");

        cityMap.put("21", "辽宁");
        cityMap.put("22", "吉林");
        cityMap.put("23", "黑龙江");

        cityMap.put("31", "上海");
        cityMap.put("32", "江苏");
        cityMap.put("33", "浙江");
        cityMap.put("34", "安徽");
        cityMap.put("35", "福建");
        cityMap.put("36", "江西");
        cityMap.put("37", "山东");

        cityMap.put("41", "河南");
        cityMap.put("42", "湖北");
        cityMap.put("43", "湖南");
        cityMap.put("44", "广东");
        cityMap.put("45", "广西");
        cityMap.put("46", "海南");

        cityMap.put("50", "重庆");
        cityMap.put("51", "四川");
        cityMap.put("52", "贵州");
        cityMap.put("53", "云南");
        cityMap.put("54", "西藏");

        cityMap.put("61", "陕西");
        cityMap.put("62", "甘肃");
        cityMap.put("63", "青海");
        cityMap.put("64", "宁夏");
        cityMap.put("65", "新疆");

        cityMap.put("71", "台湾");
        cityMap.put("81", "香港");
        cityMap.put("82", "澳门");
        cityMap.put("91", "国外");
    }
}
